BELUGA BEHR created HDFS-13820:
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Summary: Disable CacheReplicationMonitor If No Cached Paths Exist
Key: HDFS-13820
URL: https://issues.apache.org/jira/browse/HDFS-13820
Project: Hadoop HDFS
Issue Type: Improvement
Components: caching
Affects Versions: 2.10.0, 3.2.0
Reporter: BELUGA BEHR
Stating with [HDFS-6106] the loop for checking caching is set to be every 30
seconds.
Please implement a way to disable the {{CacheReplicationMonitor}} class if
there are no paths specified. Adding the first cached path to the NameNode
should kick off the {{CacheReplicationMonitor}} and when the last one is
deleted, the {{CacheReplicationMonitor}} should be disabled again.
Alternatively, provide a configuration flag to turn this feature off altogether.
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